Flexible car-truck.



C. S. SHALLENBERGER.

FLEXIBLE CAR TRUCK.

(Application filed July 14, 1902-} (No Model.)

Patented Den. I6, I902. V

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No. 7I6,294.

(No Model.)

UNITED STATES PATENT OFFICE.

CHARLES S. SHALLENBERGER, OF MILWAUKEE, WISCONSIN, ASSIGNOR OF ONE-HALFTO M. J. HURLEY, OF ST. LOUIS, MISSOURI.

OAR-TRUCK.

1 bPEGIFIGATION forming part of Letters Patent No. 716,294, datedDecember 16, 1902.

Application filed July 14,1902. Serial No. 115,585. (No model.)

To aIZZ whom ittntay concern:

Be it known that I, CHARLES. S. SHALLEN- BERGER, of the city ofMilwaukee, Milwaukee county,State of Wisconsin have invented certain newand useful Improvements in Flexible Oar-Trucks, of which the followingis a full, clear, and exact description, reference being had to theaccompanying drawings, forming a part hereof.

My object is to construct a flexible cartion consists of thecombination, with a cartruck, of springs inserted between the sides ofthe bolster and the frame and rollers under the bolster, so as to allowthe bolster to move laterally against the tension of the springs,

to illustrate my invention.

and thus making the truck flexible.

Figure l isatop plan view ofa car-truck, one end of thebolsterbeingshown in section Fig. 2 is an end elevation, upon an enlargedscale, of the bolster and frame. Fig. 3 is a side elevation of one endof the bolster with the frame removed. Fig. 4 is a top plan showing myinvention applied to a modified form of bolster.

to a second modified form of frame.

Referring to the drawings in detail, the truck-columns 10 are mountedbetween the arch-bars 11 and 12, and the spring-seat base 13 is formedintegral with and rigidly connects the lower ends of the truck-columns,there being roller-recesses 14 in the upper face of said spring-seatbase. placed in said roller-recesses, and the springseat plate 16 hasroller-recesses 17 in its lower face, so that the rollers 15 operatebetween the spring-seat plate and the spring-seat base to allow theplate to move laterally upon the rollers. The bolster 18 operatesbetween the truck -columns and is supported by the springs 19. Flanges20 project laterally from the bolster upon the inner side of thetruckcolumn, andsimilar flanges21 project laterally upon'the outer sideof the truck-columns .tolimit the endwise motion of the bolster rel-Rollers 15 are I extend into the bolster from i the inner face of thetruck-columns, and theexpansive coil springs 23 are mounted in saidpockets. The outer ends of the pockets are squared to receive thespring-plates 25, which are inserted between the springs and thetruck-columns. The plates are held in position by the upper arch-bar andslide up and down against the inner faces of the truck-columns under theaction of the springs 19, and the plates slide in and out in the squaredpockets 24, thus allowing the bolster a limited amount of lateral motionbetween the truck-columns, thetension of said springs being exerted tohold the bolster normally in a central position between thetruck-columns. As the springs 23 yield under the pressure of thebolster, the spring-plate 16 will move laterally upon the rollers 15. ll

It is a well-known fact that the stratn between the sides of a bolsterand the truck-columns is at times enormous-as when the truck is goingaround a curve and the momentum of the car has a tendency to carry thetruck in a straight line, thus forcing the load all against onetruck-column, as shown in Fig.

1. The springs 23 will greatly reduce the liability of breakingwheel-flanges, contents of the car, and car-body and injuring thetruckcolumns and the bolster at such times.

In Figs. 4 and 5 the bolster 26 is mounted in an open casing 27 and thespring-seat pockets 22 are formed in the bolster 26. The spring-plates25 are placed against the inner face of the casing 27, and bolts 28extend from the spring-plates 25 through the spring and through the wallof the truck, and nuts 29 upon the inner end of said bolts hold thesprings in place when the bolster is out of the go casing 27. The bolts28 are flexibly connected to the spring-plates, so as to allow thebolster to move up and down.

In Fig. 6 the spring-seat pocket 30 is formed integral with thetruck-column and the cap 31 telescopes into the pocket, said cap serV-ing as a substitute for the spring-plate 25. The construction shown inFig. 6 may be used with any ordinary bolster.

I claim- 1. The combination of a bolster, columns, and springs mountedwithin said bolster at a point between said columns, so as toproduce ayielding connection between said bolster and said columns, substantiallyas specified.

2. In a car-truck, the combination of a bolster having integralspring-pockets, of the columns, and springs mounted in saidspringpockets and adapted to exert a yielding pressure upon said columns, substantially as specified.

3.' The combination with a car-truck; of a yielding connection betweenthe bolster and the frame; and rollers under the bolster to allow thebolster lateral motion, substantially as specified.

4. In a car-truck, the combination of columns, of a bolster havingintegral spring-seat pockets extending into the same from the oppositeedges at a point in alinement with the columns, springs mounted in saidpockets, and spring-plates also mounted in said pockets, and adapted toengage the columns, substantially as specified.

5. In a car-truck, the combination of col-, umns, of a bolster havingintegral spring-seat pockets extending into the same from the oppositeedges at a point in alinement with the columns, springs mounted in saidpockets, the outer ends of said pockets being angular, and angularspring-plates also mounted in said pockets and adapted to engage the001- um ns, substantially as specified.

6. In a car-truck, the combination of the bolster, the frame, androllers under the bolster to permit the latter to move laterally withsmall friction, substantially as specified.

7. The combination of a bolster, a frame, springs beneath the bolster, aspring-plate beneath said springs, bearings for rollers below saidspring-plate, and rollers mounted in truck-frame, an opencasing,abolster mounted within said casing, and provided with spring-seatpockets in its opposite edges, spring-plates bearing upon the innersurface of said casing, springs mounted in said springseat pockets andbearing upon said springplates to urge the same into yielding contactwith said casing, and bolts extending from said spring-plates throughthe said springs and connecting said spring-plates to the said bolster,substantially as specified.

10. In a car-truck, the combination with the columns, of lateralspring-pockets formed integral with said columns, the bolster, capstelescopically engaging said spring-pockets, and bearing upon the edgesof said bolster, and springs mounted within said spring-pockets andarranged to force the caps into contact with the edges of said bolster,substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES S. SHALLENBERGER. Witnesses:

EDWARD E. LONGAN, M. G. IRION.

